1

App.vue

@@ -69,7 +69,8 @@
 			$t: '',
 			userInfo: {},
 			registrationID: '',
-			printData: []
+			printData: [],      // 打印任务队列，按顺序存储待打印的通知数据
+			isPrinting: false,  // 标记当前是否正在打印，防止并发
 		},
 		onLaunch: function() {
 			let context = this;
@@ -112,18 +113,22 @@
 				console.log("通知", result)
 				if (result.content.includes('订单出餐已超时')) {
 					this.onPlayAudio(2)
-				} else{
-					if(result.content.includes('您有一笔新的订单')){
+				} else {
+					if (result.content.includes('您有一笔新的订单')) {
 						this.onPlayAudio(4)
-					}else if(result.content.includes('您有一笔新的到店订单')){
+					} else if (result.content.includes('您有一笔新的到店订单')) {
 						this.onPlayAudio(3)
-					} else if(result.content.includes('您有一笔订单申请退款')){
+					} else if (result.content.includes('您有一笔订单申请退款')) {
 						this.onPlayAudio(1)
 					}
+					// 将消息数据推入打印队列
 					this.globalData.printData.push(JSON.parse(result.android.inAppExtras))
-					printer.getData()
+					console.log("通知入队，当前队列长度：", this.globalData.printData.length)
+					// 若当前未在打印，则启动队列处理
+					if (!this.globalData.isPrinting) {
+						this.processPrintQueue()
+					}
 				}
-				console.log("通知数据", this.globalData.printData)
 			});
 
 			jpushModule.isPushStopped(res => {
@@ -183,6 +188,29 @@
 			},
 		},
 		methods: {
+			/**
+			 * 打印队列处理器：取队头数据打印，打印完成后删除队头，继续处理下一条
+			 * 保证同一时间只有一条消息在打印，按接收顺序依次执行
+			 */
+			processPrintQueue() {
+				// 队列为空时，重置打印标志并退出
+				if (this.globalData.printData.length === 0) {
+					this.globalData.isPrinting = false
+					console.log("打印队列已全部处理完毕")
+					return
+				}
+				// 标记正在打印，防止并发触发
+				this.globalData.isPrinting = true
+				console.log("开始打印队头数据，剩余队列长度：", this.globalData.printData.length)
+				// 调用打印，传入 onDone 回调
+				printer.getData(() => {
+					// 打印完成（或异常跳过），从队列中删除已处理的队头
+					this.globalData.printData.shift()
+					console.log("本条打印完成，队列剩余：", this.globalData.printData.length)
+					// 继续处理下一条
+					this.processPrintQueue()
+				})
+			},
 			onPlayAudio(type) {
 				var audio = null;
 				audio = uni.getBackgroundAudioManager();

components/print/index.js

@@ -8,7 +8,8 @@
 	let isPrint= false
 	let data1 = {}
 	export default {
-			getData() {
+			// onDone: 打印完成（或失败/跳过）后执行的回调，用于队列驱动
+			getData(onDone) {
 				var that = this;
 				if(uni.getStorageSync('bluetoothDeviceId')){
 					let id = uni.getStorageSync('bluetoothDeviceId')
@@ -25,13 +26,14 @@
 							console.log('连接成功了！！！！！！！！！！！！',res)
 							if (res.data.code == 200) {
 								data1 = res.data.result
-								that.bindViewTap(id,false)
-								
+								that.bindViewTap(id, false, onDone)
 							} else {
 								uni.showToast({
 									title: res.data.message,
 									icon: 'none'
 								});
+								// 请求失败也需要通知队列继续处理下一条
+								if (typeof onDone === 'function') onDone();
 								return;
 							}
 							uni.hideLoading();
@@ -39,6 +41,8 @@
 						fail: function(err) {
 							console.log(err)
 							uni.hideLoading();
+							// 请求失败也需要通知队列继续处理下一条
+							if (typeof onDone === 'function') onDone();
 						}
 					})
 				}else{
@@ -53,11 +57,13 @@
 									url:'/pages/myCenter/setPrint'
 								})
 							}
+							// 未连接打印机也通知队列继续（跳过当前条）
+							if (typeof onDone === 'function') onDone();
 						}
 					});
 				}
 			},
-			async bindViewTap(deviceId, state) {
+			async bindViewTap(deviceId, state, onDone) {
 				var _this = this;
 				console.log(deviceId)
 				try {
@@ -83,26 +89,28 @@
 					//3.获取蓝牙设备所有服务
 					let result3 = await bluetooth.getBLEDeviceCharacteristics().then(res => {
 						uni.setStorageSync('bluetoothDeviceId', deviceId);
-						this.pickUpOnce()
+						this.pickUpOnce(onDone)
 					}).catch((e) => {
 						throw e;
 					});
 				} catch (e) {
 					//TODO handle the exception
 					console.log("e: " + JSON.stringify(e));
+					// 蓝牙连接异常也需要通知队列继续
+					if (typeof onDone === 'function') onDone();
 				}
 			},
 			//打印一次
-			pickUpOnce() {
+			pickUpOnce(onDone) {
 				isPrint = true;
 				bluetooth.notifyBLECharacteristicValue();
 				let self = this;
 				setTimeout(() => {
-					self.writeBLECharacteristicValue();
+					self.writeBLECharacteristicValue(onDone);
 				}, 500);
 			},
 			//写入控制命令
-			async writeBLECharacteristicValue() {
+			async writeBLECharacteristicValue(onDone) {
 				console.log("走到这里已经拿到数据了",data1)
 				if(data1.receiverName == null){
 					console.log("22222")
@@ -154,9 +162,9 @@
 					.setAlign('lt').setSize(1, 1).setLineSpacing(40).print('商品取到后，如有任何商品问题，请及时联系商家和平台，客服将为您服务，客服电话15533910775，谢谢您的惠顾')
 					.println();
 				let buffer = printerJobs.buffer();
-				this.sendPrint(buffer);
+				this.sendPrint(buffer, onDone);
 			},
-			sendPrint(buffer) {
+			sendPrint(buffer, onDone) {
 				// 1.并行调用多次会存在写失败的可能性
 				// 2.建议每次写入不超过20字节
 				// 分包处理，延时调用
@@ -164,11 +172,20 @@
 				const maxChunk = 20;
 				const delay = 20;
 				isPrint = true;
+				const totalPackages = Math.ceil(buffer.byteLength / maxChunk);
 				for (let i = 0, j = 0, length = buffer.byteLength; i < length; i += maxChunk, j++) {
 					let subPackage = buffer.slice(i, i + maxChunk <= length ? (i + maxChunk) : length);
-					setTimeout(this.sendPrintData, j * delay, subPackage);
+					// 最后一个分包发送完成后，标记打印结束并触发回调
+					if (j === totalPackages - 1) {
+						setTimeout(() => {
+							that.sendPrintData(subPackage);
+							isPrint = false;
+							if (typeof onDone === 'function') onDone();
+						}, j * delay);
+					} else {
+						setTimeout(this.sendPrintData, j * delay, subPackage);
+					}
 				}
-				isPrint = false;
 			},
 			sendPrintData(buffer) {
 				bluetooth.writeBLECharacteristicValue(buffer).then(res => {});